Any private house or apartment in a multi-storey building must have its own electrical panel. In the classic form, the electrical panel looks like a metal box with a door, and various devices and a meter are installed inside (or meters, if the panel refers, for example, to several apartments located on the same platform at the entrance).

For an absolutely uninitiated person, the devices located behind the door are something transcendental, it is not clear why they are standing there. Meanwhile, an electrical panel is a necessary, but unsafe thing, so it’s better not to climb into it without the need and qualifications. The distribution and accounting board (as it is correctly called) is initially designed and installed by specially trained craftsmen (electrical engineers) during the design and electrical installation works. They design the wiring, choose the future location for the installation of the shield ...

Compared to grounding systems such as TN-C and TN-C-S, the TN-S grounding system is particularly reliable and safe. This system appeared and began to gain popularity back in the 40s, having received the first wide distribution in Europe, where to this day it continues to remain deservedly in demand.

In Russia, the TN-S grounding system is also being increasingly used, and year after year it is increasingly competing with other, less reliable, grounding systems, since it is considered to be the safest and highest-quality of all known approaches to grounding in consumer power networks, especially in residential buildings. Despite the fact that the cost of installing the TN-S system is more expensive than the rest (just because of the need to lay more expensive multicore cables), nevertheless it is chosen on the basis of the requirement to ensure the greatest safety ...

Sockets are in every apartment, and they are used many times a day, they connect electrical appliances. Sometimes situations arise when you need to replace the outlet, transfer it, or simply remove it for the duration of repair and wallpapering. Although this is not difficult to do, safety precautions must be followed to avoid electric shock. In this article, we will look at how to remove a wall outlet and disassemble it.

To carefully dismantle the outlet, you need to know its device. It differs depending on the specific model and manufacturer, but, in general, the design is the same. Sockets are built-in and overhead. The built-in ones, as the name implies, are located inside the wall in the recess, and the invoices are fixed outside. Often overhead sockets are used if external wiring is laid or on thin walls, partitions, on furniture elements. The socket consists of four main parts.In the wall or in the socket, it is attached by the legs ...

When installing external wiring or laying some kind of information cable, it is advisable to immediately take care of how best to hide these wires. To solve this problem, special cable channels or plastic boxes are well suited.

Unlike the cable tray, the cable channel or box has a cover, so that the cable in it is closed. In addition, these products are produced today for every taste and color, come in various shapes and sizes, so that anyone who thinks about installing external wiring can choose a cable channel or box that is ideal for certain conditions of home, office or production the interior. The most common are plastic and metal cable ducts made of PVC and aluminum, as well as stainless steel. For administrative and industrial premises are best suited ...

Any switch that is responsible for turning on and off the light in a room, for example, must open the phase, and not zero. A phase in an AC network is one of the conductors on which an alternating voltage is constantly present with respect to the neutral conductor. The zero conductor, ideally, has zero potential with respect to earth, which always remains so in a healthy network, since the zero conductor is, by definition, grounded.

Whether the network is three-phase or single-phase, the neutral (neutral) conductor must be earthed, so it is, in principle, much safer than the phase conductor. In fact, generators and transformers have grounding, from which the electric network receives energy. If the neutral conductor is not grounded, it means that an accident has occurred in the network, a break of the neutral conductor.Usually in everyday life we ​​use single-pole switches, that is, those that open or close just one wire ...

When we make repairs and the wire of the drill or grinder turns out to be short, the usual extension cord comes to the rescue. It can be just a long two-wire cable with a single outlet on one end and with a plug on the other. Another popular household option is a round three-outlet extension cord, combining a reel for storing wires and three sockets - a classic of the 90s.

Previously, such an extension cord could be found in almost any apartment. However, devices of this plan are very primitive. In fact, they are designed to physically increase the length of the wire of the appliance if it does not reach the nearest wall outlet, nothing more. A tee, a two-wire wire, a plug - that's the whole extension cord. The surge protector is a more complicated thing. With the widespread use of personal computers, it became necessary to have several outlets at the same time near the desktop ...

When arranging a precautionary site, there is a need to conduct light into the gazebo, garage and outbuildings. The novice master is faced with the problem of choosing cable products that would serve for a long time both under the scorching sun and in severe frost. Therefore, we have put together recommendations for choosing cables for outdoor use.

There are a number of dangerous factors for cable on the street. Consider them and how to deal with them. When laying outdoors, be aware that during the storm the cable will be subjected to stresses such as stretching and jerking. The insulation of most modern products can be operated in frosts from -15 to -25. Consider this fact if you live in regions where there are severe frosts with temperatures below those indicated. Ultraviolet is perhaps the most important enemy of isolation. Under the influence of ultraviolet it is impossible to see how it is destroyed. After all, this process is happening gradually ...

The main task of an electrician is to make wiring reliable and safe. Accidents may result in fire or electric shock. Accidents occur due to increased current and short circuits. As a result, too much current flows through the conductors, they heat up and insulation melts on them, sparking or an arc occurs. In this article I will talk about how to protect wiring from overload and short circuit.

To understand the danger of high current flowing through wires, one needs to recall two important laws of physics from the course “electricity and magnetism”. The first is Ohm's law: The current in the circuit is directly proportional to voltage and inversely proportional to resistance. This means that if the circuit has low resistance, the current will be large, and if large, then small, and also with increasing voltage, the current increases with it. This seems obvious, but newcomers often have a question ...